Method and apparatus for transmission and reception of digital signals and estimation of communication channels
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United States of America Patent
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Jun 4, 2002
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N/A
app pub date -
Oct 15, 1998
filing date -
Oct 22, 1997
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Abstract
A method for estimation of a transmission channel and for transmission and reception of digital signals over the channel comprises the steps of transmission of data sequences intercalated with probe sequences, calculation in reception of a channel characteristics estimation for probe sequences received and interpolation of the channel estimation for the data sequences. After obtaining the interpolated estimation the transmission and reception method comprises the additional phase of recognition of received information data by equalizing the data sequences with the interpolation result. An apparatus employing the method has at one end of the channel a device (12) for intercalation of probe sequences between data sequences and at the other channel end a discriminator (16) which separates the probed and data sequences. An estimator (17) estimates the channel for the probe sequences and an interpolator (18) produces the desired interpolated estimation. An equalizer (19) equalizes the data sequence on the basis of the interpolated estimation.
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